Cover for cylinder locks



Feb. 26, 1957 s. w s 2,782,625

COVER FOR CYLINDER LOCKS Filed June 2, 1953 Ii I\ 1 .7 .1 .6. :4 220 W1111011.; 28 2/ 22 INVENTOR fiERZ'O/VS M/ILL/HMS.

HTTOfP/VEK United States Patent 2,782,625 COVER FOR CYLINDERIJOCKS'Merton S. Williams, Terryville, Conn., assignor to The Eagle LockCompany, Terryville, Conn .a-.-corporation of Connecticut.

Application June 2, 1953; Serial-No. 359,111 4.Claims. (Cl. 70-455) Thisinvention'relates'to a coverfor-cylinderflocks and more particularly toa devicewhichis attachable to a conventional cylinder lock to provide acover over the front. of the locle for-protecting the lockmechanism'from dust and-dirt. I

It is anobject of this invention to' provid'ea'device which may bereadily attached to' standard forms-of cylinder locks without: requiringspecial. operations or tools.

A further object of this invention is the provision of a dust coverforacylinder lock whichmay be .readily attachedto'thelock as it isinstalled in the position inwhich it is to be used.

Another object of this invention is to provide such a cover having meansengageable with the case of the cylinder lock to accurately position thecover relatively thereto.

A still further object of this invention is to provide such a cover forcylinder locks which is economical to pro duce, easy to install andhighly eflicient in its operation.

Further objects and advantages of the invention will be more clearlyunderstood from the following description and from the accompanyingdrawings in which:

Fig. 1 is a side view illustrating the manner in which my improved dustcover is attached to a cylinder lock.

Fig. 2 is a front view of the said cover.

Fig. 3 is a sectional side view, taken on line 3-3 of Fig. 2, of thecover, further illustrating its construction.

Fig. 4 is a front view, partly in vertical section, showing theconstruction of the supporting member and of the hinge portion of thecover.

Fig. 5 is a front view of the cover supporting member in blank form.

Fig. 6 is a front view of the cover member partly in blank form.

Fig. 7 is a front view of the hinge pin used in said cover.

Fig. 8 is a front view of the return spring.

As shown in the drawings, the numeral 5 indicates the case of aconventional cylinder lock which is usually provided with oppositelydisposed flat side portions 5-a and a threaded portion 6. The case has ahead portion 7 which is usually in the form of a flange that is larger rthan the threaded portion. The said lock is attachable to a member, suchas a wall 8 or the like, by inserting the threaded portion of the casethrough a hole in said member and fastening it with a suitable nut 9.

The present invention provides a dust cover which includes a supportingmember, generally indicated at 10, in the form of a circular portion 11having an opening 12 therethrough which conforms to the shape of thecase 5 of the cylinder lock and is adapted to receive said case. It willbe noted that the flat side portions 12a-12-a of said opening willengage the flat sides 5 a of the case 5 to accurately position thesupporting member relatively to the cylinder lock and also preventrelative rotation therebetween.

The said supporting member 10 has an extension 13 which is formed toprovide the stationary supporting loop 14 of a hinge 15.

supporting member.

2,782,625 Patented Feb. 26, 1957 A cover 16'is pivotally mounted uponsaid supporting member 10 by'means of parallel extensions 1717-a whichproject from the said cover and are formed to provide the movable loops18 and 19 of said hinge by meansof which the said cover is pivotallymounted upon the supporting member 10.

Thesaid hinge includes a hinge pin 20 having an enlarged' portion 21,which is of substantially the same diameter as the inside of the loop18, and a reduced shank portion 22 which is of a smaller diameter thanthe inside of the'loops 14 and 19 so as to provide a space between thesaidishank andsaid loops.

A return spring 23is contained within the said loops 14 and" 19 and. is.of nearly thesame diameter as the intern'aldiam'eter of said'loops andsurrounds the shank portion;22'so as to operatively provide an extensionof the enlarged portion 21 of the said hinge pin forsupporting'theloopsl8'and-l9in axial'alignment with the loop 14."The'ends of the hinge pin 20 are headed, as at-24 and25, so as to securethe hinge portions together.

Thesaid'spring 23 has an end portion 26 whichextends radially therefromand projects into a notch 27 in the end oftheextension 13 so as toanchor the .said spring to the The opposite end of the said springh'asaprojectiou 28" which extends into a notch 29 at the end of theextension 17-a to secure the movable end of the spring to the cover 16.

The said cover is preferably provided with a tab 30 to aid in theraising of the cover.

My improved dust cover is readily attachable to a cylinder lock, whilethe said lock is being mounted in the position in which it is to beused, by simply inserting the portion 6 of the case through the opening12 in the supporting member 10 before the said case is inserted throughthe hole in the Wall member 8.

When the nut 9 is threaded upon the portion 6 and tightened in place,the supporting member will be firmly clamped between the head portion 7of the lock and the exterior surface of said wall member and the cover16 will thereby be securely mounted in position over the front of thelock.

The spring 23 is tensioned so that it will bias the cover towards itsclosing position and normally retain it against the head of the lock inthe position illustrated in Fig. 3.

It will be understood from the above description that the outsidediameter of the spring 23 is of substantially the same diameter as theenlarged portion 21 of the hinge pin so that it will cooperate with thesaid hinge pin in supporting the loops 14, 18 and 19 of the hinge inaxial alignment.

I claim:

1. A lock cover including a supporting member having an opening therein,a hinge portion extending from said supporting member, a cover having ahinge portion extending therefrom and coo crating with the hinge portionon the supporting member for pivotally mounting the member and having amovable end portion secured to the cover for biasing said cover towardclosed position.

2. A cover for a cylinder lock having a case with a flange thereon; saidcover including a supporting member having an opening therein adapted toreceive a portion of the lock case in a position wherein the flange willengage the supporting member for retaining it in clamped positionbetween said flange and a separate member on which said lock is mounted,an extension on said supporting member formed into a loop, a coveradapted to fit over the said flange and having a pair of spaced pro:

jections formed into loops cooperating with the said loop on thesupporting member, pivot means including a hinge pin extending throughsaid loops, the said hinge pin having an enlarged portion fitting snuglyin one of the loops and a reduced portion extending through the otherloops, and a spring surrounding the said reduced portion and providing abearing for said other loops; the said spring being anchored at one endto said cover and at its opposite end to the supporting member forbiasing the cover toward closed position.

3. A lock including a case having a reduced portion and an enlargedportion forming an annular flange on said'case, a supporting membersurrounding said reduced portion and abutting said flange, a loopextending from said supporting member and disposed adjacent to theflange, a cover normally fitting over said flange and having a loopcooperating with the loop of the supporting member to provide a hingefor pivotally mounting the cover to the supporting member, a hinge pinpivotally connecting said loops, and a spring member surrounding saidhinge pin and cooperating therewith for retaining the loops in axialalignment; the said spring member acting to bias the cover toward closedposition.

4. A lock including a case having a threaded body portion and an annularflange at one end of said body portion, a supporting member having ahole therein for w s g 4 a receiving saidbody portion, the saidsupporting member being positioned between the said flange and themarginal surface of a hole in a separate member through which the saidbody portion is inserted, a nut threaded to said body portion andabutting the marginal surface of said hole for securing the lock case tosaid separate member and clamping the supporting member between theflange and the separate member, a loop extending from said supportingmember and disposed adjacent to the said flange, a cover normallyfitting over said flange and having a loop extending therefrom at eachside of the loop on the supporting member, and a hinge pin extendingthrough said loops and having a spring member surrounding a portionthereof and cooperating therewith for retaining the said loops in axialalignment; the said spring member being anchored at one end thereof'tosaid supporting-member and at its oposite end to said cover for biasingthe cover toward its normal position.

References Cited in the file of this patent UNITED STATES PATENTS 114,813

